Tape perforator



June 2, 1936.

H. L. KRUM 2,042,788

TAPE PERFORATOR Filed July 1, 1955 4 Sheets-Sheet 1 INVENTOR HUM/4 20 L KQU/ ly/y ATW June 2, 1936. H. L KRUM 2,042,788

TAPE PERFORATOR Filed July 1, 1935 4 Sheets-Sheet 2 NVENTOR 37 Win... 7 -24 /43 HOW/4P0 4 K/PUM' ij a ATTORNE June 2, 1936. H. KRUM TAPE PERFORA' IOR Filed July 1,- 1935 4 Sheets-Sheet 3 INV June 2, 1936. KRUM 2,042,788

TAPE PERFORATOR Filed July 1, 1953 4 Sheets-Sheet 4 INVENTOR #0144490 L KPUM ATTORN Patented June 2, 1%36 I SATES PATENT OFFICE aqua-res TAEE rnnrom'roa tion of Delaware Application July 1, 1933, Serial No. 678,632

22 Claims.

This invention pertains to signaling apparatus and more particularly to printing telegraph signal controlled mechanisms for producing perforated tape.

The principal object of the invention is to provide a simple, emcient, and compact. mechanism operative in response to signal impulses for recording characters in a recording medium, and

to space out automatically a predetermined I amount of the recording medium upon a cessation of signal impulses.

The apparatus for accomplishing the objects of the present invention contemplates the incorporation in a signal controlled perforating apparatus of the type disclosed in United States Patent No. 1,884,743, issued October 25, 1932 to E. E. Kleinschmidt, of power driven mechanism responsive upon a cessation of code signals for operating an auxiliary mechanism to advance automatically through the perforating apparatus a predetermined length of tape, which allows the immediate transmission of impulses represented by the code perforations therein.

Briefly, the apparatus according to this invention includes a single magnet selector mechanism responsive to received code combinations of signal impulses adapted to control permutably a plurality of punch interference members of a perforating mechanism, and atape advance ing mechanism comprising a power driven worm or screw and follower lever cooperatively related therewith responsive upon the cessation of reception of code signal impulses to control a sec-. ondary r auxiliary mechanism for spacing out a predetermined length of tape so as to preclude av situation wherein the portion of the message recorded in the tape between the punch block of the perforator and the sensing apparatus of a transmitter will be suppressed while awaiting the' reception of a succeeding message, thus insuring the complete transmission of a message without delay A better understanding of the present invention may be had fromthe following description, taken in conjunction with the accompanying drawings, wherein,

Fig. 1 is a side elevational view of the mechanism illustrated in Fig. 3;

of the main operating shaft with the operating elements mounted thereon;

Fig. 5 is a front elevational view of the mechanism of the present invention;

Fig. 6 is a sectional view taken on line 6-6 of Fig. 5-;

Fig. '7 is a perspective view of part of the punch operating mechanism;

Fig. 8 is a sectional view taken on line 8-8 of Fig. 1, and,

Fig. 9 is a fragmentary sectional view taken on line 9-9 of Fig. 5 and illustrating the cooperative relation between the selecting cam member and the operation initiating levers of the perforating and space-out mechanisms.

Having reference to the drawings wherein like reference characters indicate the same partsv thoughout the several views, the present invention is shown in the specific embodiment herein described in connection with a single magnet reperforator substantially as disclosed in the aforementioned Patent No. 1,884,743, and for a complete understanding of details not disclosedherein reference may be had to said patent. As shownin Fig. 1, the selector mechanism comprises a set of selector elements (six in the present instance) in the form of thin, fiat fingers or swords l I arranged in juxtaposed relation between guide plates 12. These plates are mounted on studs l3 and spaced by washers Ill. The circular rear ends it of the swords H engage corresponding sockets l5in six thin, fiat bell cranks I6 pivoted on a common shaft 11. Individual springs l8 normally hold the bell cranks and selector fingers or swords in the position shown in Fig. 1 with the pointed rear end [9 of the bell cranks IS in contact with a selecting cam member 2| on the main operating shaft 22 which is driven continuously by a motor 23 through a pinion 2 (Figs. 3 and 5) secured to the motor shaft 25, which pinion meshes with a gear 26 operatively associated with shaft 22. As shown in Fig. 4, the selector cam barrel 2| is frictionally driven by shaft 22 through the instrumentality of discs 60 of friction material being suitably inserted between metal discs provided therefor, the pressure for promoting the frictional relationship being supplied by a coil compression spring 21. The cam member 2| is provided with a helically arranged series of earns 28, which engage the bell cranks l6 (six inthe present instance) successively and thus reciprocate longitudinally the set of swords H as the cam barrel is rotated.

In addition to their longitudinal movement, the swords I I also have a lateral swinging movement between the pair of studs 29, the setting of each sword H either to its right-hand or its lefthand position being determined by a selector electromagnet 3| which is mounted adjustably in the apparatus. A magnet armature 32 is secured to a selector lever 33 which is pivoted on a shaft 3% in the frame of the apparatus and is subjected to the pull of a spring I0 distended between the armature 32 and an adjusting screw 55. Lever 33 terminates in a U-shaped portion 35, having laterally extending arms 36 which constitute abutments for cooperating with arms 31 on the rear ends of the swords II for moving the latter in either a right-hand or a left-hand position. The

iv carried on a pair of studs '39 and 5|.

swords l l act through a corresponding number of T-shaped levers 38, arranged between the guide plates 52 and pivotally mounted on a stud 39, to position a set of levers H. The springs to associated with bell cranks it normally hold the swords I l in their forward position and in engagement with the T-levers 38, maintaining the latter in either one or the other of its two selectable positions according to the position of the associated swords ii.

As the signal impulses are received, the electromagnet 38 responds to but one of the two different electrical conditions comprising the signals attracting its armature 32 when a marking impulse is received and releasing it again when a spacing signal is received, while the swords H are reciprocated, successively and insynchronism with the signals, by the cams 28. The arms 3 of the swords l t are thereby brought into cooperative relation with the abutments 36 of the selector lever 33 at the corresponding signal intervals, setting the selector swords i I in variant combinations.

The levers H are likewise set in variant combinations corresponding to the particular setting of swords M for each received code combination of signals. Each of the levers e! is beveled at its extremity for cooperation with a knife-edge 32 on a universal bail 33 which is pivoted at M. Levers ti are adapted to be locked in'either their clockwise or counterclockwise positions between the knife-edge l2 and a stop 45 operative in an enlarged hole in each of the levers 4i. Pivotally connected to each lever il is a punch interference member 436, the extremity of which is slidably carried in slots provided in a comb member 3'? integrally formed on a cradle 58 which is pivotal- Each of the interference members 45 is provided with an enlargement at its extremity, the purpose of which is to cooperate with an associated punch 52, the enlarged portion being adapted to be slid into or out of cooperative engagement with an associated punch 52 as determined by the position of its associated lever 4|. A rod l fill (Fig. 8) is disposed .over the interference members do and is provided to guide the members 46 and to prevent independent upward movement thereof.

The perforating mechanism for operating the punches 52 will now be described. Having reference to Figs. 3, 4, and 5, the main shaft-22 is indicated as journalled in anti-friction bearings 20 and 30 mounted in frame 4!) and is constantly rotated through gear 26 and pinion 2G by an electric motor 23. Also mounted on theshaft 22 is a flanged sleeve member 55 to which is secured the operating cam 56 for the signal-hole punches 52. Sleeve 55 has a slidable connection with a flanged member 57, a helical spring 58 being interposed between members 55 and 51. The tension of spring 58 tends to create through a disc of friction material 59 a aosavee frictional connection between member 5'! and gear 26. Slidably carried on sleeve member 55 is a bushing 55 which forms the driven member of a grab clutch 52, the driving member 63 of which is keyed to the shaft 22. By this construction a combination friction and grab clutch is provided whereby the cam 55 is actuated during the initial and final periods of its rotation by the friction means 59 and during its effective or intermediate period of operation by the grab or tooth clutch 52. The drivenportion of the grab clutch is urged during its operative period into mesh with the driving portion 53 by a compression spring 64. This tendency, however, is counteracted by a stop lever 55 (Figs. 3 and 5) which ooacts with a cam formed on the side of flange 55 integral with bushing 5i. Lever 65, which is pivoted at 67, is normally urged into cooperative relation with the cam formed on the flange 66 by its spring 68. Lever $5 is provided with an arm 59 (Fig. 9) which cooperates with one of the helical series of cams on the selecting cam member 2! in such manner that, at a predetermined point in the cycle of" rotation or operation of the selector cam member 2!, the cam portion ii will coach with arm 59 to rotate lever 55 against the action of its spring 58 for disengaging it from bushing 6 i, permitting the cooperative engagement of bushings 5i and 53 of clutch 52 and the ensuing single cylic rotation of said clutch in the following manner.. When lever 65 is disengaged from bushing B l, the bushing Si is actuated toward the right into mesh with the driving member 53. However, immediately upon the disengagement of lever 55 the rotation of bushing Si is initiated through the instrumentality of friction means 59 to move the cam portion on flange 56 out of range of the follower portion of lever E55. Simultaneously *with this movement the meshing of bushings 6i and 53 will be operated. due to the action of spring 54 to render the positive clutch 52 effective. During the single cycle of rotation of clutch 52, the lever 55 will be restored to'its operative position with respect to bushing 64 by spring 63 preparatory to coacting again with the cam portion on flange 58, which occurs during the final period of rotation of clutch 52, at which time the power communicated through friction clutch means 59 will effect through the camming action of the cam on flange 65 and the follower on lever 55 the disengagement of bushings 5i and B3.

Cam 55 coacts with a follower roller 72 (Figs. 3 and 5), carried at the extremity of one arm of a punch-operating bell crank lever i3 which is freelymounted on a shaft it suitably carried in the frame til. As clearly shown in Figs. 3 and 7, the lever i3 is provided with an arm 75 at the extremity of which is pivotally articulated an adjustable strut it which functions to actuate the cradle is pivotally about pivots as he 5!.

Referring again to Figs. 4 and 5, it is noted that the gear 25 is carried on a flanged sleeve 11, affixed to shaft 22, which'forms the driving portion of a grab clutch 78, the driven portion 79 of which is normally held out of mesh with the driving portion H by .a fixed cam follower 8| adapted to coact with a cam portion formed on the side of flange 82 integral with clutch portion 719. The clutch portion 79 is maintained out of meshing engagement with driving portion H by the cam follower 8! against the action of a compression spring 83 and has a slidable connection with a cam member 8d sothat cam 84 rotates with the clutch l8. Frictionally associated with cam 84 is a clutch assembly 85 comprising a flanged sleeve 83, cam 84 is thus frictionally connected to drive shaft 22, whereby, together with positive clutch 18, cam 84 is, during a cyclic operation, initially and finally controlled by the friction clutch and intermediately controlled by the positive clutch 18 in a manner similar to that set forth in connection with aforementioned cam 56.'

Cam 84 cooperates with a follower roller 95 (Figs. 3 and 5) carried at the extremity of a lever 98 whichis clamped tightly on shaft 14. In this manner shaft 14 is constrained to rock in accordance with the movement of lever 98. At the right-hand extremity of shaft 14, as'viewed in Fig. '7, is secured a lever 91 which cooperates with a member 98 (Figs. 1 and '1) which is also pivotally carried on the studs 49 and 5|. The lever 91 is provided at its extremity with an adjusting screw 99 which serves to provide an adjustable relation between lever 91 and member 88. Also pivotally carried on lever 91 substantially intermediate the adjusting screw 99 and the'shaft 18 is a feed punch carrier I8I which is provided with a slotted hole I82 which engages the pivot stud I 88 carried on the lever 91. The purpose of the slotted hole I82 is to permit the operation of carrier IN and hence feed punch I85 either with the cradle 48 and associated punches 52 or independently. The carrier I8I is provided at its upper extremity with a shouldered portion which cooperates with a vertical projection I84 integrally formed on the cradle 48. As viewed in Figs. 5 and 7, the carrier IN is also notched to provide a se t for a feed punch I85. It is clearly apparent that the feedpunch I85 is operable either independently of or eonjointly with the signal hole punches 52 in the following-manner. Upon reciprocation of strut 18 by means of the punch operating lever 13 (the lever 91, at this time, remaining unoperated due to the inaction of cam 84, Fig. 3), the cradle 48 will be oscillated about pivots 49 and 5| thus likewise causing interference members 48 to oscillate about their common pivot to actuate the punches 52 in accordance with the relative positions of the enlarged ends of the interference members 48. Simultaneously, punch carrier I8l will be carried upwardly by the cooperation of projection I84 and the shoulder on carrier IN to actuate feed punch I85, the purpose of slotted hole I82 being to permit the actuation of carrier IN by cradle 48 independently of lever 91 during the normal reception of code signal impulses. Thus, it is seen that the actuation of cradle 48 through the instrumentality of the punch operating member 13 causes the actuation of signal punches 52 and feed punch I85 conjointly.

rovision is made for the independent opera tion of the feed hole punch I85, thus. when a rocking motion is imparted to shaft 18 by the cooperation of cam 88 and follower 95, as will presently appear, a corresponding rocking motion or oscillation will be imparted to lever 91 which, since it carries the feed punch car ier I8I,'wi1l cause a corresponding reciprocal motion of carrier I8I independently of cradle 88, which at this time remains at rest due to a cessation of reception of code signal impulses, and the consequent inaction of cam 55. Member 98, which is interposed between cradle 48 and lever 91, is controlled by either the cradle 48 or the lever 81 to effect the stepping or advancement of the tape. Member 98 is provided with a vertical portion I86 at the upper end of which is pivotally carried a feed pawl I81 which is normally urged into cooperative engagement with the ratchet portion of cylinder I88 by a spring I89 distended between the pawl member I81 and member 98. Portion I88 of member 98 is provided with a projection III which is adapted to cooperate with a vertical projection I I2 on cradle 48 so that, when cradle 48 is oscillated about its pivots 49 and 5I, member 98 will be reciprocated correspondingly through the cooperation of projections III and H2 to effect the stepping of the tape I I3 through the actuation of cylinder I88 by pawl I81 in a manner well known in the art, the cylinder I88 being provided also with a circumferential series of tape-feed pins II8 (Fig. 3). Also, when cradle 48 remains at rest and lever 91 alone is oscillated, member 98 will respond to the movement of lever 81 through its cooperation with adjusting screw 99 to efiect the stepping of the tape 3 through pawl I81 and pins II8 of cylinder I88.

The oscillation of cradle 48, during each oscillation thereof, also effects the actuation of locking ball 42 because, as cradle 48 is swung upwardly. the member 43 is allowed to rotate about its pivot 44 by the pull of a spring H4. The proper timing of the motion imparted to member 48 is governed by an adjustable member I I5 pivotally carried on the side wall of the cradle 48 (Fig. 5). As shown, one end of member II 5 carries a roller II8 which coacts with the bent portion of a depending arm or member 42. The other end of lever H5 is provided with an enlarged hole through which extends a clamping screw III of considerably smaller diameter. In this manner lever II5 can be rotated slightly in either direction about its pivot to determine by proper adjustment the timing of the engagement of ball 42 with levers 4I.

Incidentally, the punches 52 and I85, which are spring returned, are operatively carried in a punch block II8, as indicated in Fig. 3, and are adapted to be movable through a guide plate I I9 and coact with die plates to perforate the tape H8.

The left end of shaft 22 (as viewed in Figs. 1,

2, 3, and 4) is formed with a pinion I2I which meshes with a gear I22 loosely carried on a stud shaft I28 mounted on the frame 48. Integrally formed with the gear I22 is a square-threaded worm or screw I 24 which cooperates with a follower or traveling member I25 to effect, upon the cessation of reception of code signals, the stepping out or spacing out of a predetermined length of tape, as will presently appear.

The cam projection 1I (Fig. 9) not only coacts with lever 85, but also cooperates cyclically with a lever arm I28 fixed to a rock shaft I21 (Figs. 1 and 3) suitably carried in brackets I28 and I29 aflixed to the frame 48. At the left extremity of the rock shaft I21 (Figs. 1, 3, and 6) there is clamped an adjustably positionable member I8I on which is pivotally carried at I82 the follower lever or traveling arm I25. Having particular reference to Fig. 6, it is seen that the arm I25 is normally urged in a clockwise direction about pivot I32 by a spring I83. The movement of arm I25 is limited by a slot I84 therein and a shoulder screw I85. Upon each cyclic operation of the selecting cam member 2|, the

lever arm I26 is actuated against the action of its spring I36 (Figs. 5 and 9) to rock the shaft I21 slightly; thus raising the arm I25 out of operative engagement with the constantly rotating screw I24. In the event that no signals are received; that is, upon a cessation of reception of code signals, during which period the rotation of selecting cam member 2| is arrested, the arm I25 remains in cooperative engagement with the screw I24, and hence will be caused to travel longitudinall'y with respect to the axis of the screw I24 until it either reaches the end of the series of screw threads thereon or is raised out of operative engagement with the screw upon the initiation of rotation of the selecting cam member 2| upon resumption of code signal reception. Thus, whenever the arm -|25 has traveled any distance, however slight, along the screw I24 and is again raised out of operative engagement with the screw, it is actuated in a. clockwise direction by its spring I33 to the starting position.

Pivotally articulated to the traveling arm I25 (Figs. 1 and 3) is the extremity of the vertical arm of a bell crank |31 pivotally supported at I38 to a bracket mounted on frame 40. Through this interconnection with traveling arm I25, the bell crank I31 is caused to rotate in a counterclockwise direction whenever the traveling arm is actuated leftwardly along the screw I24. The extremity of the horizontal arm of the bell crank I31 is provided with a longitudinally adjustable member I39 adapted to coact with a member |4| adjustabl'y carried on arm I42 of a release lever I43 mounted on a stud shaft I44 secured to frame 48. Release lever I43 is normally biased in a counterclockwise direction by a spring I 45 against an eccentric adjusting screw I46. Member MI is normally actuated in a clockwise direction by a spring I41 against an eccentric adjusting screw I48 carried on arm I42 of release lever I43. By means of their respective adjustments, the timed engagement or bite between members I39 and MI can be accurately controlled.

Upon a cessation 'of code signals, the rock shaft I21 remaining quiescent due to the arrested motion of cam member 2|, the follower I25 will thereupon travel along the screw I24, and in so doing, portion I39 of bell crank I31 will, at a predetermined moment, engage member |4| of release lever 43. Upon the continued movement of driving arm I25, bell crank I31 will be actuated counterclockwise, to rotate, in turn, release lever I43 in a clockwise direction out of engagement with stop disc 81. Release lever 43 will remain out of positive engagement with the stop disc 81 upon the further continuance of the travel of the arm I25 along the screw I24 until the bell crank I31 has been rotated a suflicient amount so that the portion I39 has become disengaged from the portion I4I. As has been noted, the period of engagement between portions I39 and I has been predetermined by their respective adjustments, so that the stop disc 81, and hence cam 84, have been permitted to rotate a predetermined number of times, the ultimate effect of which is to permit a series of oscillations of lever 96 to rock, correspondingly, shaft 14 to oscillate lever 91 in turn to actuate the feed punch I05 and to oscillate member 98 to efiect the feeding of the tape. In this manner the continued rotation of stop d sc 81 and cam 84 for a predetermined length of time will cause the feeding or spacing out of the tape a definite predetermined length or distance.

When the portions I39 and HI have become dis- -into either of their two positions according to engaged by the continued travel of arm I 25 along screw I24, lever I43 will respond to the tension of its spring I45 and will be rotated into arresting engagement with stop disc 81, effecting simultaneously the arrest of cam 84 and the dis- 5 continuance of the spacing-out operation. The follower arm I25, however, will continue to travel along the screw I24 until it has reached the end of the series of threads where it will remain until code signals are again received, at which time lever I26 will again be actuated to rock the shaft I21 to raise in turn the follower arm I out of coaction with the screw I24, whereupon the follower arm |25 will be restored to its right-hand position by its spring I33, and the cycle of operation described will be repeated.

General operation A further understanding of the structure constituting the present invention can, it is thought,

. be obtained from the following detailed descriptheir normal positions, the selector magnet 3| 25 is normally energized due to the fact that the current on the line is of marking nature. Since the start impulse of a code combination of signal impulses is of spacing nature, the reception thereof preceding a signal code causes the deener'gization of selector magnet 3|, whereupon selector lever 33 is actuated by its spring 10 in a clockwise direction to eiiect through plunger I49 the initiation of rotation of the selecting cam member 2|. The cooperative effect of the member 2| (which is rotated in synchronism with incoming signals) and selector lever 33 (which is actuated in either of two positions by the signal impulses) will be to set the swords I I by means of levers I6 the nature of the signal impulses received, as previously described. Levers 4| will be set through T-levers 38 to correspond with the setting of swords II, thereby establishing the positions of the interference members 46 preparatory to perforating the signal code in the tape. After the cam member 2| has rotated a predetermined angular amount, the cam projection 1| (Fig. 9) thereon cooperates with lever 65 to eifect the operation of clutch 62 to cause in turn the opera- 50 tion of lever 13 by cam 56, which operation functions through strut 16 and cradle 48 to actuate punches 52 and I85 simultaneously, the latter being efiective by reason of the cooperative relation between cradle 48 and punch carrier IIII through projection I04, thereby producing in the tape a series of code signals in one position and a feed punch hole in another position, the feed hole in relation to its associated signal holes being thereby prepunched. When, during the perforating operation the cradle 46 is oscillated, lock bail 42 is operated in proper timed relation with the perforating operation to maintain levers 4|, and hence interference bars 46 in their selected positions. Such is the operation of the perforator during the normal reception of signal code combinations of impulses.

However, in the event that the reception of code signals ceases, the present invention contemplates the provision of mechanism responsive to the cessation of code signals to space out a sufficient amount of tape to insure the complete transmission of the message recorded therein. The mechanism shown in Fig. l is accordingly 75 prises essentially a constantly rotating screw or worm and a follower arm coacting therewith, the coaction of which is controlled through the rock shaft I2I by the lever I26. The lever I26 is actuated once during each cyclic operation of cam member 2| to lift arm I25 out of cooperative engagement with screw I24 to permit its return by spring I33 to the start position. But, when the reception of code signals ceases, the arm I25 remains in cooperative engagementwith screw I24 and travels along the threads thereof to effect the rotation of bell crank I31, and through members I39 and MI, a counter-rotation in release arm I43, whereupon the clutches I8 and 85 are rendered effective for rotation for a predetermined length of time, depending upon the adjusted engagement or bite established between members I39 and I4I. The ensuing continued rotation of cam 84, which is controlled by clutches I8 and 85, (:auses, through lever 96, shaft I4 to rock continuously, thus oscillating arm 9! secured to the end thereof, correspondingly, to operate through punch carrier IIJI the feed punch I 05. The oscillation of arm 91 also effects, through member 96 and pawl M1, the stepping of the tape. The amount of tape to be stepped or spaced out is determined by the distance between the pin block of the transmitter and the'punch block of the perforator, and the amount of tape actually spacedout is accordingly obtained by the adjustment established between members I39 and MI. As previously described, the arm I25 continues to travel along the screw I24 even after the member I39 has become disengaged from member I4I, until arm I25 has reached the end of the screw, to insure the positive operation of the spacingout mechanism. The mechanism remains in this condition; that is, with the arm I25 at the left end of the screw I24, as viewed in Fig. 4, until the resumption of reception of code signals, whereupon lever I26 will again be actuated by cam projection II to raise'or lift,'through shaft I2I, arm I25 out of engagement with screw I24, whereupon arm I25 will be returned to its rightward position by its spring I33.

Manually operated space-out means The present invention also contemplates the provision of a manually operated space-out means for facilitating the introduction of tape to the perforating mechanism, such as the feeding initially of tape stock or material to the perforator. This means is shown in Figs. 2 and and comprises a member I5I slidably supported through screw and slot connections I52- and I53-to the frame of the apparatus. Member I5I is normally held in its vertical or upward position by a spring I54. The lower extremity of member I5I is beveled and cooperates with the bell crank I55 of the latch mechanism, shown in Fig. 2, for initiating the rotation of the selecting cam member 2 I. As already set forth, a constant tendency to rotate is imparted to member 2| through its frictional connection to main shaft 22. The cam member 2| is held against rotation by the cooperation of a stop arm I56 secured thereto (Fig. 2) with said latch mechanism which is controlled by an arm I5I of selector lever 33 through the plunger I49. A feature of this invention resides in the initiation of operation of the selector mechanism, and hence the apparatus either by means of received signal impulses or by manually operable means. By the former mode of control the initiation of operation is effected through the instrumentality of the selector magnet 3I. Thus, upon the deenergization of magnet 3| by the start impulse, selector lever 33 will be biased slightly clockwise by its spring 30 so that the eccentric screw on arm I5I will function to urge plunger I 49 rightwardly to rotate 5 bell crank I 55 in a counterclockwise direction (as viewed in Fig. 2) whereby latch I56 is caused to rotate in an opposite direction against the tendency of a compression spring I 59 to effect its disengagement from stop gate I6I. Stop gate I 6| is normally held against the stop I62 by a spring I63, but since the torque constantly applied to the cam member 2|, and hence to stop arm I56, is of greater force than that exerted by spring I 63, the holding effect of stop gate I6I on arm I56 is overcome and cam member 2I permitted to rotate. The action of arm I56 on gate I6I being to rotate gate I6I a certain angular amount against the action of its spring I63 until the disengagement of arm I 56 from gate I6I occurs, gate I6I will thereafter be returned to its position against stop I62 by spring I63.

During the last portion of the revolution of arm I56, the selector magnet 3I becomes energized by the stop impulse of the code combination of impulses under which condition latch I 58 will be engaged with gate I6I to prevent the rotation of said gate when arm I56 strikes arm I64 thereof. The arrest of arm I56, and hence of cam member 2| will prevail until either a start or no-current impulse is received to effect the deenergization of magnet 3| and the consequent operation of plunger I49, as just described, or by the manual operation of bell crank I 55 by the manual tape space-out release member I5I. Thus, when lever I5I is depressed, the beveled surface at its lower extremity will impart a camming action upon bell crank I to effect a rotation of said bell crank in a manner comparable to the action of plunger I49 thereon to initiate the rotation of cam member 2I in a manner similar thereto, as just described. However, the continued depression of member I 5I will hold bell crank I55 in its counterclockwise position (Fig. 2), to hold in turn member I58 unlatched from stop gate I6I, thus permitting the cam member 2I to rotate continuously, which rotation effects through cam 56 and the perforator operating lever I3 the continued perforation and advancement of the tape. When the selector cam member 2I is operated in this manner, the interference members 46 are set in their operated position; that is, with their enlarged ends positioned beneath the punches 52, and an all marking or rub-out signal will be perforated in the tape; the reason for this being that, 55 since the normal stop condition of the signal line is marking, the selector magnet 3| will be energized during the prolonged stop period or interval, and the rotation of cam member 2 I, will effect the actuation of the selecting elements, and hence 0 interference members 46, to their marking positions.

Although the present invention has been disclosed and described with reference to tape perforators, it is, of course, understood that the in- 65 vention is capable of embodiment in many and widely varied forms other than that specifically disclosed, without departing from the spirit and scope of the present invention.

What is claimed is:

1. In a tape perforator, a perforating mechanism, a selecting mechanism responsive to signals for controlling the operation of said mechanism, means for advancing the tape with each operation of the perforating mechanism, a cam mechanism, 75

and means constantly tending to operate but rendered ineiiective during normal signaling periods including a duality of clutches cooperatively related to each other and to said cam mechanism effective upon a cessation of signals for operating said advancing mechanism a predetermined amount.

2. In a tape perforator, a perforating mechanism, a selecting mechanism responsive to code signals for controlling the operation of said mechanism, means for advancing the tape with each operation of the perforating mechanism, and

means comprising a cam dually operated through a friction clutch and a positive clutch and efiective upon a cessation of code signals for operatating means, a second spacing operating means,

means controlled by said selector mechanism for rendering said first spacing operating means effective and said second spacing operating means ineffective, and means operable upon the ineffectiveness of said first spacing operating means to render said second spacing operating means efiec-=' tive.

'5. In a'tape perforator, a selector mechanism cyclically operated by code signals, tape advancing means, a constantly rotating shaft, means upon which a constant tendency to function is imparted by said shaft, means for disafiecting said means upon each cyclic operation of said selector mechanism, and means efiective upon a cessation of code signals to render said second mentioned means effective to cause the actuation of said tape'advancing means a predetermined number of times. 1 6. In a tape perforator, a perforating mechanism, tape advancing means, a selecting mechanism responsive to code signals for controlling said perforating mechanism, means for operating said tape advancing means once for each code signal applied to said selecting mechanism, and

separate means directly controlled by said selecting mechanism for automatically operating said tape advancing means a predetermined number of times.

Y 7. In an apparatus for preparing a control strip, signal controlled means, a constantly rotating shaft, dual means operatively associated with said shaft tooperate said means, each of said dual means including a friction clutch adapted to be operatively associated with said signal controlled means during its complete cycle of operation and a positive clutch adapted to be operatively associated intermittently with said controlled means, a first means efiective during the reception of code signals to connect through the instrumentality of one of said sets of clutches and its associated one of said dual means said controlled means to said shaft, a second means means to said shaft, and means individual to each of said dual means to render their respective .positive clutches effective only during the efiectual period of operation of said signal controlled means. 5

8. In combination, a selector mechanism responsive to code combinations of signaling impulses, a device for forming indicia on a tape,

vance the tape a predetermined amount. 15

9. In a printing telegraph apparatus, a recording mechanism for recording characters on a medium, a selecting mechanism responsive to signals for controlling the operation of the recording mechanism, means for advancing the 20 medium, a cam mechanism, and means 'constantly tending to operate but rendered ineffective during normal signaling periods including a duality of .clutches cooperatively related to each other and to said cam mechanism efiective' 25 upon a cessation of signals for operating the advancing mechanism a predetermined amount.

10. A perforating mechanism comprising a plurality of punches, means for selecting said punches for operation, power driven means for 30 operating the selected punches to perforate a tape and e'fiect its advancement, and separate means controlled directly by said selecting means and effective when said selecting means is not operated for advancing said tape a predetermined '35 amount.

11. A perforating mechanism including a single selecting electromagnet, a plurality of punches, means responsive to the energization of said electromagnet for selecting said punches for op- 40 eration, means for operating the selected punches to perforate a tape'and effect its advancement, and separate means controlled directly by said selecting means and effective when said selecting means remains ineffective for a predetermined period for causing the advancement of said tape apredetermined amount.

12. A perforating mechanism including a single selecting electromagnet, a plurality of punches, means responsive to the energization of said 50 electromagnet for selecting said punches for ,operation, powerdriven means for operating the selected punches to perforate a tape and effect ,its advancement, means tending invariably to initiate and control the continuous advancement v55 of the tape, and means operative for each selective operation of the punches for disabling said last mentioned means.

13. A perforating mechanism comprising a plurality of punches, means for selecting said 0 punches for operation, power driven means for operating the selected punches to perforate a tape and effect its advancement, additional power driven mechanism for also causing the advancement of the tape, and means directly controlled 5 by said selecting means and effective upon a predetermined cessation of the operation of said selecting means for rendering said additional tape advancing means efiective to advance said tape a predetermined amount. 70

14. A' perforating mechanism comprising a plurality of punches, means for selectingsaid punches for operation, power driven means for operating the selected punches to perforate a tape and effect its advancement, additional means .75

operative to advance said tape, means tending normally to render said additional means effective, and means responsive to the operation of said selecting means for rendering said last mentioned means inefiective and for efiecting the disablement of said additional advancing means.

15. A perforating mechanism comprising a plurality of punches, means for selecting said punches for operation, power driven means for operating the selected punches to perforate a tape and effect its advancement, additional means also operative to advance the tape, and means effective for each cycle of operation of said power driven means for rendering said additional means ineffective. v

16. A perforating mechanism comprising a plurality of punches, means for selecting said punches for operation, power driven means for operating the selected punches to perforate a tape and effect its advancement, additional means operative to advance the tape, and means directly controlled by said selecting means and operative .during a cessation of the operation of said selecting means for operating said additional means to cause the advancement of said tape a predetermined amount.

17. In combination in a. tape perforator, a code signal controlled selecting device, a normal spacing means, an auxiliary spacing means, means to render said normal spacing means effective to space the tape for each code selection, and means directly controlled by said selecting device toinitiate said auxiliary spacing means into operation upon a cessation of code signals.

18. In combination, a device for forming indicia on a tape, a selector mechanism responsive to code combinations of signaling impulses, means responsive to the operation of said selector mechanism for advancing the tape one step upon each operation of said device, and separate means directly controlled by said selector mechanism and initiated into operation upon a cessation of code signals to advance the tape a predetermined amount.

19. In combination, a device for forming indicia on a tape, a code signal controlled selecting device, means responsive to the operation of said selecting device for advancing the tape one step upon each operation of said first mentioned device, and means, comprising a first part directly controlled by said selecting device and a second part controlled by said first part, initiated into operation upon a cessation of code signals to advance the tape a predetermined amount.

20. In conrlbination, a device for forming indicia on a tape, a code signal controlled selecting device, means responsive to the operation of said selecting device for advancing the tape one step upon each operation of said first mentioned device, and means initiated into operation upon a cessation of code signals to advance the tape a predetermined amount, said last recited means comprising a first part directly controlled by said selecting device and a second part controlled by said first part, the cooperable relationship between said first and said second parts being determinative of the amount of advancement imparted to the tape during said cessation of code signals.

21. In combination in a tape perforator, a code signal controlled selecting device, a normal s'pacing means, an auxiliary spacing means, means to render said normal spacing means effective to space the tape for each code selection, and means to initiate said auxiliary spacing means into operation upon a cessation of code signals, said last recited means comprising a first part directly controlled by said selecting means, and a second part controlled by said first part, the cooperable relationship between said first and said second parts being determinative of the amount of advancement imparted to the tape during said cessation of code signals.

22. A perforating mechanism comprising a plurality of punches, means for selecting said punches for operation, power driven means for operating the selected punches to perforate a tape and effect its advancement, additional means operative to advance the tape, and means operative during a cessation of the operation of said selecting means for operating said additional means to cause the advancement of said tape a predetermined amount, said last recited means comprising a first part directly controlled by said selecting means and a second part controlled by said first part, the cooperable relationship between saic'; firstand said second parts being determinative of the amount of advancement imparted to the tape during said cessation of operation. 7

HOWARD L. KRUM.

Ill) 

